affect 影响 例句：Water pollution affects water quality. 水的污染影响水质。out of breath上气不接下气   例句： When he dashed back, he was already out of breath.当他急速跑回来时，他已经是上气不接下气了。Don't sweat it.别紧张。对话：A: The car broke down and the repair shop is ten milesaway. What should we do?B: Don't sweat it. Maybe we can fix it. 　A：车子坏了，可修车厂在十英里以外，我们该怎么办呢？B：别紧张，也许我们能修好它。